[Insight-users] Re: BSpline Deformable Registration Error

[Matt Robert]

Another error I am getting is

IFLAG= -1. LINE SEARCH FAILED. SEE DOCUMENTATION OF ROUTINE MCSRCH ERROR
RETURN
 OF LINE SEARCH: INFO=4 POSSIBLE CAUSES: FUNCTION OR GRADIENT ARE  INCORRECT
OR
INCORRECT TOLERANCESvnl_lbfgs: ** EEEK **
ExceptionObject caught !

On 8/25/06, Matt Robert <matt.roberto at googlemail.com> wrote:
>
> Hi,
>
> I used example DeformableRegistration4 to register two images. It works
> perfectly well and gives good results while reading images from disk.
>
> I tried extracting two slices from two volumes and used the code given in
> DeformableRegistration4 to register them but it gives the following error.
> All the parameter and initialization values are same as in example.
>
> If I save these two slices on disk and use the example, then it works.
>
> Initial Parameters =
> [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> 0, 0, 0
> , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> 0, 0,
> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> 0, 0,
>  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> 0, 0, 0
> , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
>
> Starting Registration
>  F = 0.00143433, GNORM = 0
> *************************************************
>    I   NFN    FUNC        GNORM       STEPLENGTH
> THE SEARCH DIRECTION IS NOT A DESCENT DIRECTIONIFLAG= -1. LINE SEARCH
> FAILED. SE
> E DOCUMENTATION OF ROUTINE MCSRCH ERROR RETURN  OF LINE SEARCH: INFO=0
> POSSIBLE
> CAUSES: FUNCTION OR GRADIENT ARE  INCORRECT OR INCORRECT
> TOLERANCESvnl_lbfgs: **
>  EEEK **
> ExceptionObject caught !
>
> itk::ExceptionObject (0137F814)
> Location: "unknown"
> File: \itksrc\Code\Numerics\itkLBFGSOpt
> imizer.cxx
> Line: 265
> Description: itk::ERROR: LBFGSOptimizer(01905DD0): Error occured in
> optimization
>
> In VS 6.0, I used quick watch and it showed that in fixed and moving
> images, the m_Direction field was different for both images, one was [(1 ,
> 0),(1,0)] the other was [(1,0),(0,1)]. To resolve this problem I created two
> empty images and copied data from previous ones using iterators, but still
> same error.
>
> Matt
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://public.kitware.com/pipermail/insight-users/attachments/20060825/d9eca4a5/attachment.htm